From "The Complete Book of Minerals for Health" by Sharon Faelten and the editors of Prevention Magazine.
"Dental enamel is rich in molybdenum. Some research indicates that molybdenum may enhance the effect of fluorine in prevention of tooth decay, possible you promoting retention of fluorine."
"Bones, cartilage and teeth require minute amounts of vanadium for proper growth."
Trace mineral strontium plays a part in preventing tooth decay too.
I think most trace mineral product contain these 3 minerals.